package com.fs.module.weixin.utils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;

/**
 * @author wangkai
 * @2016年7月4日 下午5:17:08
 * @desc: jpsapi公众号支付http请求工具
 */
public class HttpClientUtil {

	public static String SendGET(String url, String param) {
		String result = "";// 访问返回结果
		BufferedReader read = null;// 读取访问结果

		try {
			// 创建url
			URL realurl = new URL(url + "?" + param);
			// 打开连接
			URLConnection connection = realurl.openConnection();
			// 设置通用的请求属性
			connection.setRequestProperty("accept", "*/*");
			connection.setRequestProperty("connection", "Keep-Alive");
			connection.setRequestProperty("user-agent",
					"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			// 建立连接
			connection.connect();
			// 获取所有响应头字段
			// Map<String, List<String>> map = connection.getHeaderFields();
			// 遍历所有的响应头字段，获取到cookies等
			// for (String key : map.keySet()) {
			// System.out.println(key + "--->" + map.get(key));
			// }
			// 定义 BufferedReader输入流来读取URL的响应
			read = new BufferedReader(new InputStreamReader(
					connection.getInputStream(), "UTF-8"));
			String line;// 循环读取
			while ((line = read.readLine()) != null) {
				result += line;
			}
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (read != null) {// 关闭流
				try {
					read.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return result;
	}

}
